Panel



FIG. 1 is a front perspective view of a panel according to the present design;

FIG. 2 is a back perspective view of the panel of FIG. 1;

FIG. 3 is a top view of the panel of FIG. 1;

FIG. 4 is a bottom view of the panel of FIG. 1;

FIG. 5 is a left side view of the panel of FIG. 1; and,

FIG. 6 is a right side view of the panel of FIG. 1. 

CLAIM The ornamental design for a panel, as shown and described. 